CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 152,067	$ 140,622
Short-term investments	104,535	105,256
Restricted cash	2,094	2,134
Trade receivables	39,220	36,523
Receivables and prepaid expenses	13,619	14,279
Inventories	24,138	22,555
Total current assets	335,673	321,369
LONG-TERM ASSETS:
Property and equipment, net	8,421	8,442
Field equipment, net	7,266	6,924
Right-of-use assets, net	13,920	0
Other long-term assets	4,975	3,058
Total long-term assets	34,582	18,424
TOTAL ASSETS	370,255	339,793
CURRENT LIABILITIES:
Trade payables	29,943	26,708
Other payables, lease liabilities and accrued expenses	41,005	37,852
Total current liabilities	70,948	64,560
LONG-TERM LIABILITIES:
Long-term loan, net of discount and issuance costs	149,305	149,268
Deferred revenue	9,407	9,929
Employee benefit liabilities	2,823	2,683
Long-term lease liabilities	11,015	0
Other long-term liabilities	363	1,094
Total long-term liabilities	172,913	162,974
TOTAL LIABILITIES	243,861	227,534
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS' EQUITY:
Ordinary shares no par value, unlimited shares authorized; issued and outstanding: 95,692,797 shares and 93,254,185 shares at March 31, 2019 (unaudited) and December 31, 2018, respectively	0	0
Additional paid-in capital	783,941	757,314
Accumulated other comprehensive income (loss)	(1,742)	(1,400)
Retained earnings (accumulated deficit)	(655,805)	(643,655)
Total shareholders' equity	126,394	112,259
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 370,255	$ 339,793